| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef _LIBCPP___PSTL_CPU_ALGOS_FOR_EACH_H |
| #define _LIBCPP___PSTL_CPU_ALGOS_FOR_EACH_H |
| |
| #include <__algorithm/for_each.h> |
| #include <__config> |
| #include <__iterator/concepts.h> |
| #include <__pstl/configuration_fwd.h> |
| #include <__pstl/cpu_algos/cpu_traits.h> |
| #include <__type_traits/is_execution_policy.h> |
| #include <__utility/empty.h> |
| #include <optional> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| #if !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17 |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| template <class _Iterator, class _DifferenceType, class _Function> |
| _LIBCPP_HIDE_FROM_ABI _Iterator __simd_walk(_Iterator __first, _DifferenceType __n, _Function __f) noexcept { |
| _PSTL_PRAGMA_SIMD |
| for (_DifferenceType __i = 0; __i < __n; ++__i) |
| __f(__first[__i]); |
| |
| return __first + __n; |
| } |
| |
| template <class _ExecutionPolicy, class _ForwardIterator, class _Functor> |
| _LIBCPP_HIDE_FROM_ABI optional<__empty> |
| __pstl_for_each(__cpu_backend_tag, _ForwardIterator __first, _ForwardIterator __last, _Functor __func) { |
| if constexpr (__is_parallel_execution_policy_v<_ExecutionPolicy> && |
| __has_random_access_iterator_category_or_concept<_ForwardIterator>::value) { |
| return __pstl::__cpu_traits<__cpu_backend_tag>::__for_each( |
| __first, __last, [__func](_ForwardIterator __brick_first, _ForwardIterator __brick_last) { |
| [[maybe_unused]] auto __res = std::__pstl_for_each<__remove_parallel_policy_t<_ExecutionPolicy>>( |
| __cpu_backend_tag{}, __brick_first, __brick_last, __func); |
| _LIBCPP_ASSERT_INTERNAL(__res, "unseq/seq should never try to allocate!"); |
| }); |
| } else if constexpr (__is_unsequenced_execution_policy_v<_ExecutionPolicy> && |
| __has_random_access_iterator_category_or_concept<_ForwardIterator>::value) { |
| std::__simd_walk(__first, __last - __first, __func); |
| return __empty{}; |
| } else { |
| std::for_each(__first, __last, __func); |
| return __empty{}; |
| } |
| } |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17 |
| |
| #endif // _LIBCPP___PSTL_CPU_ALGOS_FOR_EACH_H |